Molding-machine



(No Model.)

H. 8v G. FQREYNOLDS.

MDLDING MACHINE.

No. 568,548. Patented sept. 29, 1898.

UNITED STATES PATENT ERICE.

IIENRY REYNOLDS AND GEORGE ERANCIS REYNOLDS, OE NEw HAVEN, CONNECTICUT.

MOLDING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 568,548, datedSeptember 29, 1896.

Application led November 25, 1895; Serial No. 570,065. (No model.)

To @ZZ whom it may concern.'

Be it known that we, HENRY REYNOLDS and GEORGE FRANCIS REYNOLDS, of NewHaven, in the county of New Haven and State of Connecticut, haveinvented a new Improvement in Molding-Machines, andwe do hereby declarethe following, when taken in connection with the accompanying drawingsand the letters of reference marked thereon, to be a full, clear, andexact description of the same, and which said drawings constitute partof this specification, and represent, in-

Figure l, a front view; Fig. 2, a side View; Fig. 3, a sectional View onthe line 3 3 of Fig. 1; Fig. 4, a detached View of one of the links,showing its connection to the moldboard and rock-shaft; Fig. 5, asectional View illustrating the connection of one of the guides to theInoldboard.

This invention relates to an improvement in molding-machines,particularly such as are employed in molding small articles in sandpreparatory to casting, and is an improve ment on the Inachine patentedJuly 24, 1883, No. 281,926, the object of this invention being tosimplify the construction of the machine and increase the pressurerequired and decrease the amount of force necessary for operation; andthe invention consists in the construction and combination of parts ashe rein after described, and particularly recited in the claims.

The frame of the machine consists of an upper cross-bar A, supported bylegs B B, which legs are connected by a brace C. Mounted on thecross-bar A and formed in tegral therewith are four vertical guide-tubesD, arranged in pairs at opposite sides ofthe bar. Mounted in bearingsbetween each pair of guides is a rock-shaft E, formed with two pairs ofears c and at its outer end with a crank-arm'F, into the outer end ofwhich is fixed an operating-lever G. The crank-arm is offset from theshaft for the purpose which will hereinafter' appear.

H is a moldboard constructed on its under face with four lugs I,corresponding in position to the guide-tubes D and recessed to receivenuts J. Secured to each lug l is a guide K, which consists of a tubularportion corresponding in external diameter to the internal diameter ofthe tubes D, and formed at its upper end with a flange 7o and secured inposition by a bolt L, which extends upward through the guide K and lug Iinto engagement with the nut J, whereby the guide is clamped to the lug,the head of the bolt forIn ing a bearing at the lower end of the guide,as shown in Fig. 5. The moldboard H is connected to the shaft E by linksM, the lower ends of which are pivoted between the ears e. The upperends of the links are formed with trunnions m, which are seated insockets 7L, formed integral with the moldboard, and across these socketsare plates t', which are secured in position by screws j, whereby thelinks are held in position. As the ears e are upon one side of the shaftE, it is apparent that as the shaft is turned the moldboard will beraised or lowered accordingly and held in vertical position by theguides in the guide-tubes D. Mounted on trunnions N, formed on Oppositesides of the frame, are rods O, connected at their upper ends by aplaten P, which is adjustable vertically upon the rods O, which arescrew-threaded for that purpose. To limit the'swinging movement of theplaten, stops Q are formed on the sides of the frames above thetrunnions M and integral with the frame, which stops consist of lugs q,one of which carries a screw r, by which the movement of the rods O isadjusted, and the other a rubber packing S, against which the rods Owill strike in their rearward movement.

To counterbalance the platen and assist in movin g the same, a weight Ris em.ployed,from which a chain S extends vover a pulley T, mounted inthe frame to the center of a bar U, which is formed at each end with anarm u, which a'rms are respectively attached to the rods O. Alsoattachedto the arms O and preferably to the point of attachment of thearms u are guards V, which protect the stops and trunnions from sandwhich falls from the.

is arranged upon the moldboard when itis in its depressed position andfilled with sand. The platen is then turned upward, so as to IOO standover the ask, and adjusted into proper position with relation thereto.In their raised position the rods O stand vertical, which position ispermitted by the oli'set of the crankarm F from the rock-shaf t E. Thelever G is then turned, which rocks the shaft E, and through the links Mraises the moldboard and compresses the sand in the mold or flaskbetween it and the platen, the moldboard being guided vertically by theguides and guide tubes, and owing to the fact that the links areconnected to ears offsetting from the shaft a cam action is securedthereby and a very7 high degree of pressure upon the mold is sccured.The lever is then thrown upward, which depresses the 1n oldboard,and theplaten thrown backward, as indicated in Fig. 2, in which movement it iscounterbalanced by the weight R, which, being connected to the centerinstead of at one side, controls its movement equally, and in itsrearward movement it strikes the cushion s, which avoids jarring. Theiiask is then free to be removed and another one placed on themoldboard. Then the platen is retired, as shown in Fig. 2, the guard Vstands over the stops and trunnions N, so that they are protected fromsand as the mold or flask is being filled.

By forming the guides K tubular a large bearingsurface is obtained andthe surfaces of the tubes are readily finished so as to easily slidewithin the guide-tubes.

IVe are aware that guides have been formed with threads at their 'upperends :for engagement with the under face of the moldboard ,to act asguides therefor, but a much better result is obtained by the use of thesupplemental tubes, as herein described.

By operating the rock-shaft immediately below the moldboard greatpressure may be obtained with the minimum amount of force.

It will be seen that in this construction the number of parts requiredis greatly reduced and the principal part of the machine formed in asingle casting.

l. Ina molding-machine the combination with a frame formed with verticalguide-tubes of a moldboard formed with chambcred lugs upon its underside corresponding in position to said tubes, tubular guides extendingthrough said guide-tubes, nuts seated in said chambers, and headed boltspassing upward through said guides into engagement with said nutswhereby said guides are supported and secured in position, substantiallyas described.

2. In a molding-machine the combination with the frame thereof, ofplaten-rods pivoted in trunnions on opposite sides of the frame, stopsarranged above said trunnions, and guards secured to said rods and so asto extend over said stops and trunnions, substantially as described.

3. In a molding-machine, the combination with the frame formed at itsupper end with guidetubes, a moldboard provided with guides sliding insaid tubes, a rock-shaft mounted between said tubes, links connect ingsaid moldboard and rock-shaft, a swinging platen carried by rods pivotedon opposite sides of the frame, and a lever connected to a crankoffsetting from one end of the said rock-shaft, substantially asdescribed.

In testimony whereof we have signed this specification in the presenceof two subscribing witnesses.

HENRY REYNOLDS.

GEORGE FRANCIS REYNOLDS. lVtnesses:

CLARA M. REvNoL'Ds,

W. ll. REYNOLDS.

